Design of a Bidirectional CL 3 C Full-Bridge Resonant Converter for Battery Energy Storage Systems

Yih-Her Yan, Yong-Nong Chang and Zhi-Xuan Peng
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Yih-Her Yan: Department of Electronic Engineering, National Formosa University, No. 64, Wenhua Rd., Huwei Township, Yunlin County 632301, Taiwan
Yong-Nong Chang: Department of Electronic Engineering, National Formosa University, No. 64, Wenhua Rd., Huwei Township, Yunlin County 632301, Taiwan
Zhi-Xuan Peng: Department of Electronic Engineering, National Formosa University, No. 64, Wenhua Rd., Huwei Township, Yunlin County 632301, Taiwan

Energies, 2022, vol. 15, issue 2, 1-22

Abstract: In this study, a bidirectional CL 3 C full-bridge resonant converter was developed using a bidirectional active bridge converter as the main framework to improve conventional LLC resonant converters. A resonant inductor and resonant capacitor were installed at the secondary side of the developed resonant converter. The bidirectional operation of this converter enables zero-voltage switching at the supply-side power switch and zero-current switching at the load side. The aforementioned phenomena enhance the overall circuit efficiency and enable the resonant tank voltage to be increased in the reverse mode, which cannot be achieved with conventional bidirectional LLC resonant converters. The electrical equipment isolation function provided by a transformer made electricity usage safer, and digital control technology was adopted to control electrical energy conversion and simulate bidirectional energy conversion. Specifically, the experiment and simulation emulated how the developed converter enables energy transmission from a DC grid to a battery energy storage system through constant current–constant voltage charging and energy transmission from a battery energy storage system to a DC grid through constant power discharging.

Keywords: LLC resonant converters; zero-voltage switching; zero current switching; bidirectional full-bridge converter (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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